[
https://issues.apache.org/jira/browse/BEAM-3494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16330077#comment-16330077
]
suganya commented on BEAM-3494:
-------------------------------
he following code is using apache beam libraries to create a pipeline.Please
find the code.
public void run(String[] args)
{ BeamCLIOptions beamCliOptions =
PipelineOptionsFactory.fromArgs(args).withValidation()
.as(BeamCLIOptions.class); Pipeline pipeline = Pipeline.create(beamCliOptions);
MergeDistribution mergeDistribution = MergeDistribution
.valueOf(beamCliOptions.getMergeDistribution()); MergeDistribution
fixedWindowDuration = MergeDistribution
.valueOf(beamCliOptions.getFixedWindowSize()); KafkaIO.Read<String, String>
kafkaEntityStreamReader = KafkaIO.<String, String>read()
.withBootstrapServers(beamCliOptions.getKafkaServers())
.withTopic(beamCliOptions.getKafkaTopic())
.withKeyDeserializer(StringDeserializer.class)
.withValueDeserializer(StringDeserializer.class)
.updateConsumerProperties(ImmutableMap.of("auto.offset.reset",
"latest","enable.auto.commit","true"));
pipeline.apply(kafkaEntityStreamReader.withoutMetadata())
.apply(Values.create()) .apply(Window.<String>into(
FixedWindows.of(Duration.standardMinutes(fixedWindowDuration.getMins())))
.triggering(Repeatedly.forever(AfterProcessingTime.pastFirstElementInPane()
.plusDelayOf(Duration.standardMinutes(mergeDistribution.getMins()))))
.discardingFiredPanes() .withAllowedLateness(Duration.ZERO))
.apply(ParDo.of(new ExtractDataFn( beamCliOptions.getDatePartitionKey(), new
DateTime().minusDays(beamCliOptions.getDaysAgo()).getMillis())))
.apply("Applying GroupByKey on YYYY-MM-DD HH ", GroupByKey.create())
.apply("Applying Merge ", ParDo.of(new MergeDataFn(beamCliOptions)));
pipeline.run(); }
> Snapshot state of aggregated data of apache beam project is not maintained in
> flink's checkpointing
> ----------------------------------------------------------------------------------------------------
>
> Key: BEAM-3494
> URL: https://issues.apache.org/jira/browse/BEAM-3494
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Reporter: suganya
> Assignee: Kenneth Knowles
> Priority: Major
>
> We have a beam project which consumes events from kafka,does a groupby in a
> time window(5 mins),after window elapses it pushes the events to downstream
> for merge.This project is deployed using flink ,we have enabled checkpointing
> to recover from failed state.
> (windowsize: 5mins , checkpointingInterval: 5mins,state.backend: filesystem)
> Offsets from kafka get checkpointed every 5
> mins(checkpointingInterval).Before finishing the entire DAG(groupBy and
> merge) , events offsets are getting checkpointed.So incase of any restart
> from task-manager ,new task gets started from last successful checkpoint ,but
> we could'nt able to get the aggregated snapshot data(data from groupBy task)
> from the persisted checkpoint.
> Able to retrieve the last successful checkpointed offset from kafka ,but
> couldnt able to get last aggregated data till checkpointing.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
